381643 ÷ 86 
We want to divide 381643 by 86.

Moving on to step 1:
3 divided by 86 is 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 86

Advancing to step 2:
86 can be fit into 38 0 times, resulting in a remainder of 38.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 38 after subtracting 0 from 38.
Fetch the next digit (1) from the dividend, attach it to 38 and continue: 381 / 86

Step 3:
If we divide 381 by 86, we get 4 and a remainder of 37.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtract 344 from 381 to get 37.
Take the next digit (6) from the dividend and append it to 37, then repeat: 376 / 86

Going ahead to step 4:
86 goes into 376 4 times with a remainder of 32.
Put 4 as the next digit of the answer. 
Result so far: 44.0
If we take 344 away from 376, we end up with 32.
Grab the next digit (4) from the dividend, add it to 32, then carry on: 324 / 86

Advancing to step 5:
324 divided by 86 is 3 with a remainder of 66.
Record the quotient 3 as the next digit in the result. 
Result so far: 443.0
If we take 258 away from 324, we end up with 66.
Bring next digit (3) of the dividend behind the 66 and repeat the process: 663 / 86

On to step 6:
When dividing 663 by 86, we get 7 with a remainder of 61.
The next digit of our result is 7. 
Result so far: 4437.0
The remainder is 61 after subtracting 602 from 663.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 7:
The number 86 fits into 610 7 times, leaving a remainder of 8.
The next digit of our result is 7. 
Result so far: 4437.7
Deduct 602 from 610 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 8:
When dividing 80 by 86, we get 0 with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 4437.7
If we take 0 away from 80, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 9:
800 divided by 86 is 9 with a remainder of 26.
Write down 9 as next digit of the result. 
Result so far: 4437.709
Subtract 774 from 800 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 10:
If we divide 260 by 86, we get 3 and a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 4437.7093
If we take 258 away from 260, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 11:
86 can be fit into 20 0 times, resulting in a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 4437.7093
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 12:
86 can be fit into 200 2 times, resulting in a remainder of 28.
Record the quotient 2 as the next digit in the result. 
Result so far: 4437.709302
Subtracting 172 from 200 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 13:
86 can be fit into 280 3 times, resulting in a remainder of 22.
Put 3 as the next digit of the answer. 
Result so far: 4437.7093023
Deduct 258 from 280 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 14:
86 can be fit into 220 2 times, resulting in a remainder of 48.
Use 2 as the next digit of our solution. 
Result so far: 4437.70930232
If we subtract 172 from 220, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final outcome is 4437.70930232, with a leftover of 4.8e-08.